大跨度混凝土楼盖舒适度分析  

COMFORT-ANALYSIS OF LARGE-SPAN CONCRETE FLOOR

作　　者：梁剑 林斯嘉 赖洪涛 LIANG Jian;LIN Sijia;LAI Hongtao(Architectural Design&Research Inst.South China University of Technology,Guangzhou 510641,China)

机构地区：[1]华南理工大学建筑设计研究院有限公司,广州510641

出　　处：《低温建筑技术》2024年第4期153-156,共4页Low Temperature Architecture Technology

摘　　要：人行走的频率在1~3 Hz,为避免人行引起共振,所以规范规定楼盖竖向振动频率不宜小于3 Hz。案例为某钢筋混凝土框架-剪力墙结构,混凝土楼盖最大悬挑跨度9.3 m,非悬挑最大跨度24 m,存在竖向竖向振动频率小于规范限制3 Hz的情况,因此需对楼盖补充动力时程分析计算,通过对结构施加人行激励,验算楼盖振动舒适度满足了规范要求。研究结果表明,楼盖的结构设计、振动响应和隔振措施等因素对震动舒适度具有重要影响,选取楼盖振幅最大位置节点进行动力时程分析的方法可行,评价楼盖舒适度的结果可信,得出结论基于竖向加速度作为决定舒适度是否超标的本质标准,对楼盖实施合理的设计改进措施,可以有效改善和保障楼盖的振动舒适度。Since the frequency of human walking is 1 Hz~3 Hz,the specification stipulates that the vertical vibration frequency of the building cover should not be less than 3 Hz to avoid the resonance caused by human walking.A reinforced concrete frame-shear wall structure is with the maximum overhanging span 9.3 m and the maximum span of the non-overhanging span 24 m,the vertical vibration frequency of which is less than the specification limitation of 3 Hz,so it is necessary to supplement the power time series of the building cover.Therefore,it is necessary to supplement the dynamic time course of the building cover with analysis and calculation,and the vibration comfort of the building cover is verified to meet the code requirements by applying pedestrian excitation to the structure.The results show that the structural design,vibration response,and isolation measures of a floor have an important impact on vibration comfort.The method of selecting the node with the maximum amplitude of the floor for dynamic time history analysis is feasible,and the results of evaluating the comfort of the floor are reliable.Implementing reasonable design improvement measures based on vertical acceleration effectively improves the vibration comfort of the floor.

关 键 词：振动频率 大跨度混凝土楼盖 人行激励 

分 类 号：TU318[建筑科学—结构工程]